Method of making window envelopes



June 28, 1932. A. NOVICK 1,865,037

METHOD OF MAKING WINDOW ENVELOPES Filed Sept. 19. 1927 3 Sheets-Sheet 1 \/\\1 1" Invent? byahw i Attorneys June 28, 1932. A. NOVICK METHOD OF MAKING WINDOW ENVELOPES Filed Sept. 19. 1927 :5 Sheets-Sheet 2 Attorneys June 28, 1932. A. NOVICK 7 METHOD OF MAKING WINDOW ENVELOPES Filed se' t. 19, 1927 5 Sheets-Sheet 3 Patented June 28, 1932 UNITED STATES PATENT, OFFICE ABRAHAI NOVICE OF I'LUSHING, NEW YORK, ASSIGNOB 1'0 1'. L. SMITH]! mom 00., 1110., 01' NEW YORK, N. Y, A. OOBI'ORATION .01 NEW YORK m!) 0] 111mm wnmow WP Application ma September 10,1021. mm Io. $20,204.

It is an object of this invention to provide a continuous web of material havin formed therein the transparencies of the finished envelopes whereby window envelopes may be i made at a cost not substantially greater than enve ope made from the blank shown in Fig- A ure 1; Fig.3.is a view of the back of the envelope;

Fig. 4is a view of a modified blank; Fi 5 is a completed envelope made from the b ank shown in Fig. 4 in which the side flaps are on the outside;-

Fi 6 shows the same form of envelope in w ich the flaps are inside;

Fig. 7 is a diagrammatic showing in plan illustrating one method of preparing the imp're ated strip; a0 8 is a corresponding view of' same in elevation;

Fig. 9 is a plan view illustrating the subsequent steps of cutting and applying the gum to the partiall formed blank and foldmg to produce the orm of envelope shown in Figs. 1,2 and 3; and

Fig. 10 is an elevational view of the means shown in Fig. 9 for carrying out the cutting, gumming and certain of the folding steps.

Figures 11 and 12'diagrammatical y trate an additional method of making a web having a transparent panel or zone. The figures are respectively in plan and elevation.

Referring to Figure 1, 10 denotes generally an envelope blank of the side seam type, havillusing the usual sealing flap 11, front 12, bottom flag 13, and side flaps 14 and 15, the sealing an side flaps being gummed as is customary in envelo of this type. Extending length wise of t e front 12 1s a window portion 16 which preferably extends the entire length of the blank. Fig. 3 shows the side flaps 15 out: side the bottom flap, although if desired the side flaps may be inside such flap.

Fig. 4 which shows an alternative form, has a bottom flap 13a provided with a window rtion 16a also extending across the entire ttom flap. In addition the side fla 2 14a and 15a are preferably made slight y wider in order that when made into the finished envelope the side flaps will cover up the respective ends of the window portion thereby makin such window of less effective extent and giving it the appearance of window envelopes of the usual type in which the Y pregnating a strip of pa r from which theblanks are to be out wit a material givmg the requisite transparency.- Such substances are well known and easily procured and per se form no part of the present invention and therefore need not be considered v a in detail.

.' My invention contemplates an improved method for making an envelope of the types above described. Referring to 'Fi 7 20 denotes a web of ,envelo material, from the roll 21 and passing, ist, to impregnating rolls 22which operate to impart to the web 20 a continuous translucent or transparent strip 23. After this has occurred the web is moved to a drying chamber 24 whence it may be formed into a roll 25 which may now 00 i l 3 a plo be taken to the envelope making machine pro r.

igs. 9 and 10 illustrate diagrammatically the operations performed by such machine.

5 Thus a web 26 of the impregnated material from roll is fed to a cutter 27 which operates to form the actual blanks by' cuttin out portions which leave top flaps 11 an bottom flaps 13. Thence the web traverses hshare 28 which turns over the bottom flap a r which the web consisting of the partiallycut out blanks passes beneath a g'urnming roll 30 which su plies a layer 31 of gum to the region 0 the side flaps.

. While not limited to the envelopes of thehaving a continuous, longitudinally extend ing strip of transparent material and a continuous, longitudinally extending, strip of relatively opaque paper adjacent each edge of Thence the web passes beneath a cutting roll 32 which separates the blanks along the line v cb--a of the side flaps. After this has occurred the separated blanks are furtherspaced apart ner described.-

-"by means of a feed roll including roll 33 and then the remaining operation of folding s1de flaps is performed by ploughshares 34 and pressing roll 35, the finished envelope being. shown at B.

It will be seen from the foregoing that I thus first form a continuous web which bears a continuous transparent strip. A roll of such material may then be distributed to manufacturers having suitable envelope machinery and the envelopes formed in the man- It will also be apparent that I may form the transparent portion ofthe blank or of the web of the material by the method of pasting a separate sheet of transparent material along the edges of separated strips in lieu of forming the window section by imregnation. Such a method is illustrated in l igures 11 and 12. Two spaced 'strips of paque paper are drawn from a pa r of supy reels and 51.- The strips pass over a guide roller 52, thence to a second guide roller 53 from which the pass on, either to a storage'reel or direct y to the forming machine. Mounted on a shaft 54 above the ffirst guide roller 52 are hold down rolls 55 and 56 and a pair of paste applying rolls 57 and 58; The latter run in contact with a pair of paste transfer rolls .59 and 60 which m turn make contact with a roller 61 wh ch runs in a paste'vat'62. The paste'ap lying rolls 57 and 58 apply a narrow strip 0 paste to the inner margin of each strip of opaque paper.

A strip of transparent material is drawn saidtransparent strip, severing the composite 1 web into individual anks, each blank thereby-having a transparent zone extending the entire length thereof and intermediate the width thereof, and thereafter completing the manufacture of the containers while main- :tainin the transparent area fully exposed throug out one face of the container.

2. The method of making paper containers, which comprises providing continuous webs which are respectively transparent and relatively opaque, overlappin and adhesively 05 uniting ad acent margma portions of the transparent and opaque webs to form a comsite web, successively severing individual lanks from the com site web, and forming the blanks successive y into containers.

3. The method of making paper containers, which comprises providing continuous webs which are respectively transparent and relativel opaque, overlappin and adhesively unit ng ad acent margma portions of the transparent and opaque webs to form a composite web, successively severing individual blanks from the composite web, and folding an end portion of each blank over against, and adhesively uniting it to, a body portion thereof.

'4. The method of making paper containers, which comprises providing continuous webs which are respectively transparent and relatively opaque, overlapping and adhesively uniting ad acent margina portions-of the transparent and opaque webs to form a comite web, successively severing individual lanks from the composite web, and folding an end portion of each blank over against, and adhesively uniting it to, a body portion thereof, formed from the material of the opaque web.

from a su ply reel 63 and passes-over the '1: second gui e roller 53. This strip is of such ja"width that it overlaps the pasted margin set each of the spaced. opaque strips. A presrmly into asted engagement with-the margins of hot opaque strips, thus forming a "sirigle wcb' having the same desirable characteristics as the'impregnated web hereto fore estates.

sure roller 64 cooperates with the second fgl'uid'e roller'53 topress the transparent strip.

5. The method of making paper containers. which comprises forming a composite web having a continuous, longitudinally extend-f ing strip of transparent material and acontinuous longitudinally extending strip of relative y opaque paper adjacent each edge of said transparent strip, folding one strip of opaque materiel dong a line intermediate its width, eeveri the composite web into individual blanks, each blank thereby havin atrans arent zone extendin theentlrelengtfi thereo and intermediate t 0 width thereof and thereafter comple the manufacture a the containers while maintaining the transarent area hilly exposed throughout one ace of the container.

In testimony whereof I heve fixed my signature to this specification.

' ABRAHAM NOVICK. 

